Message type: E = Error
Message class:  CNV_CDMC_CC - CDMC - Messages for the Control Center 
Message number: 014
Message text: System already specified for statistics collection
The system referred to by this RFC destination has already been
specified for Statistics Collection.
Statistics Collection can be activated only once for each system. For
this reason, you should ensure that the RFC destinations all point to
different SAP Systems.
Check the following conditions -
Does this RFC destination already exist in the list of statistics
systems ?
Is there already another RFC destination which points to the same SAP
SAP system?
If either of the above conditions is true, you cannot use this RFC
destination for Statistics Collection.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_CDMC_CC014 indicates that the system you are trying to configure for statistics collection has already been specified in the system settings. This error typically arises during the configuration of the SAP system for data migration or during the execution of a data migration project using the SAP Conversion and Data Migration Cockpit (CDMC).
Cause: The error occurs because: The system you are trying to set up for statistics collection is already registered in the system configuration. There may be an attempt to register the same system multiple times, which is not allowed.
Solution: To resolve the error, you can follow these steps: Check Existing Configuration: Go to the configuration settings for statistics collection in the SAP system. Verify if the system is already listed. If it is, you do not need to add it again. Remove Duplicate Entries: If you find that the system is listed multiple times, remove the duplicate entry. Ensure that only one entry for
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